• Current Industrial and Technological Trends in Aerospace
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• v.8 no.2
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• pp.113-123
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• 2010

To accommodate the increasing air traffic and increase safety and efficiency of aviation operation, ICAO (International Civil Aviation Organization) recommended the development and implement of a new CNS/ATM system which is based on GNSS technologies and data link communication. The system is composed of Communication, Navigation, Surveillance and Air Traffic Management. ICAO approved the Global Air Navigation Plan for CNS/ATM systems. The world aviation leader countries launched CNS/ATM Research and Development program to enable the Global Plan and support the transition of air traffic infrastructure. In this paper, to establish the direction and measures of domestic technology development, CNS/ATM technology trend is analyzed.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2014.10a
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• pp.225-226
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• 2014

향후 차세대 전자해도 뿐만 아니라 다양한 S-10x 데이터 및 서비스, S-100 표준 기반의 e-Navigation 정보, 항로표지 정보가 개발될 것으로 예상 된다. 이 연구에서는 S-100표준 기반의 S-10x 시험데이터 및 시험환경 구축, 차세대 ECDIS와 증강현실 정보표시 시스템 및 On-Shore 차세대 항행정보 지원 시스템으로 구성되는 차세대 항행정보 지원 시스템을 개발 중에 있다.

• 한국항공운항학회:학술대회논문집
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• 2015.11a
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• pp.98-101
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• 2015

항공교통수요의 증가와 그에 따른 항공분야 발전에 따라 현재 사용하고 있는 항행안전시설들에 대하여 기술적 보완 및 업그레이드의 필요성이 대두되었다. 국제민간항공기구(ICAO)에서는 항공교통량의 증가를 수용하고, 항공 운항의 안정성과 효율성을 높이기 위해서 차세대 항행시스템(CNS/ATM)으로의 전환을 권고하였고, 각 국은 기존 항행시설의 성능과 한계를 극복하고 증가하는 항공교통량을 원활히 수용하기 위하여 차세대 항공교통관리 전략을 추진해 오고 있다. 이러한 차세대 항행시스템(CNS/ATM)의 효과적인 활용을 위해 자동화 시스템이 도입되었고 관련된 인적요소가 위성항행시스템 발전의 핵심 열쇠라고 ICAO에서 언급하였다. 본 논문에서는 차세대 CNS/ATM의 자동화에 따른 인적요소에 대하여 연구해 보았다.

• Journal of Advanced Navigation Technology
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• v.19 no.2
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• pp.123-132
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• 2015

Among various fields of the CNS/ATM, the surveillance field which includes ADS-B system, MLAT system, and WAM system is implemented. These next generation systems provide superior performance in tracking aircrafts. However, They still have error. In this paper, filtering algorithm is proposed in order to enhance aircraft tracking performance of ADS-B, MLAT, and WAM systems. The proposed method is a Robust Interacting Multiple Model filter, called Robust IMM filter, that improves IMM filter. The Robust IMM filter can not only improves the aircraft tracking performance but also track aircraft continually using estimates calculated from the filter when data losses occur. The simulation results of the proposed aircraft tracking methods show that the filtering data provides a better performance up to an average of 19.21%.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2014.10a
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• pp.242-244
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• 2014

최근 해양사고에 따른 피해가 늘어남에 따라 선박의 안전항해에 대한 관심이 높아지고 있다. 이에 따라 해양사고에 대한 규제 및 사고 방지를 위한 기술의 개발도 활발하게 진행되고 있으며, 많은 IT 기술들을 적용한 다양한 항해장비들이 개발되어 항해사의 안전운항을 지원하고 있다. 그러나 다양하고 많은 정보를 무분별하게 제공하기 보다는 정보를 표시하고 서비스하는 효율적인 방법에 대한 연구가 더욱 필요한 실정이며, 항해사가 신속하고 정확하게 의사결정을 할 수 있도록 항해장비는 보다 단순하고 직관적인 인터페이스를 가져야 할 것이다. 이러한 관점에서 본 논문에서는 차세대 항행지원 시스템의 요구사항을 정의하고, 이를 구현하기 위한 방법으로 증강현실 기술을 활용하는 방법에 대하여 기술한다. 본문에서는 CCTV 카메라를 기반으로 하는 항행지원 시스템의 설계와 각 모듈의 구현에 대해 설명하며, 선박운항 시뮬레이터를 이용한 시스템의 적용 가능성에 대해서도 언급한다. 이러한 증강현실 기반의 항행지원 시스템은 해양사고 방지 및 운항 효율 증대에 기여할 것으로 기대한다.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.38C no.5
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• pp.440-451
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• 2013

Recently, researches of technology and standardization for maritime safety are proceeding internationally. In particular, some technologies and strategies for e-Navigation have been developed and the necessity of development of next generation VTS (Vessel Traffic Service) has been raised in Korea. In order to construct user oriented VTS system for domestic environment, VTS operators are asked for their requirements related to developing VTS and the opinions should be reflected in the VTS. So in this paper, we collect the requirements from fifteen VTS centers in the country and we also analyze them. Furthermore, we propose an ASM (Application Specific Messages) service, which was not supported by current VTS, and we verify the proposed ASM through AIS (Automatic Identification System) system and simulation terminal for maritime safety.

• Journal of Advanced Navigation Technology
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• v.16 no.2
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• pp.234-239
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• 2012

Next generation mobile communication systems have been studied and applied to support various services. In next generation mobile communication systems, the most interested research is the integration of various communication systems and the offer of various services by using high-speed data transmission. The integration of communication systems has been researched by using multi standard modem, while the high-speed data transmission for the offer of various services has been applied by using OFDM. This paper has proposed the method to reduce PAPR by using multi standard modem. with EVM, this paper has also suggested the method to compensate in-band distortion while reducing PAPR. By using the proposed methods, this paper has analyzed and simulated the decrease efficiency of PAPR, the performance of CCDF, and the performance of BER in next generation mobile communication systems. The simulation results improved the performance of next generation mobile communication system can be seen that.

• Journal of Advanced Navigation Technology
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• v.23 no.1
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• pp.36-43
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• 2019

In this paper, a novel channel access scheme for the next-generation vehicle to anything (V2X) system based on IEEE 802.11p standard which is applied to recent connected car technologies is suggested and analyzed. The proposed scheme proposes a channel access method utilizing OFDMA multi-user transmission for IEEE 802.11p based system. In this paper, the authors examine geographical distance and network area performance of IEEE 802.11p system and the proposed scheme. Results of this research show that the proposed scheme is quite suitable for improving conventional V2X standards and systems. This paper also provides mathematical analysis and simulation results of the conventional IEEE 802.11p system and the proposed scheme.

• Journal of Advanced Navigation Technology
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• v.17 no.1
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• pp.56-62
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• 2013

Recently with smart phones and tablets, next generation mobile communication systems have supported various multimedia contents services. Thus, multimedia communication systems have been gradually increased compared to voice communication systems. Since the growth of multimedia services has increased users' duration on systems and decreased systems' effectiveness on power, a study on effective usage of power needs to be researched. Furthermore, radio shadow areas under heavy urban environments have generated unnecessary power consumption which reduces the usage duration of power on next generation mobile communication systems. This paper has reviewed the communication network architecture on next generation mobile communication systems and the unnecessary power consumption in radio shadow areas. This paper has also proposed the method of the effective power usage and analyzed the effective power usage on next generation mobile communication systems with simulation.

• Journal of Advanced Navigation Technology
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• v.13 no.4
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• pp.544-550
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• 2009

In this paper, we proposed the radio wave propagation characteristics of the next-generation ultrafast wireless communication system in millimeter-wave fading channel. For considering doppler shift and Rayleigh fading simultaneously, the fading simulator of Jakes model implemented and analyzed the performance of the next-generation wireless communication system. In addition, the error rate characteristics of DS-CDMA system analyzed in the millimeter-wave fading channel and the system performance improved by coding technique and diversity technique.